The beginnings of modern-style classification systems can be traced to the 1500s – 1600s when several attempts were made to scientifically classify plants.

More precisely, it tries to classify problems that can or cannot be solved with appropriately restricted resources.

In order to classify a business as a service, one can use classification systems such as the United Nations's International Standard Industrial Classification standard, the United States ' Standard Industrial Classification ( SIC ) code system and its new replacement, the North American Industrial Classification System ( NAICS ), the Statistical Classification of Economic Activities in the European Community ( NACE ) in the EU and similar systems elsewhere.

As with other diagramming tools, mind maps can be used to generate, visualize, structure, and classify ideas, and as an aid to studying and organizing information, solving problems, making decisions, and writing.

To do so, mind maps can be analysed with classic methods of information retrieval to classify a mind map's author or documents that are linked from within the mind map.

The color of the powdery print, called a spore print, is used to help classify mushrooms and can help to identify them.

Depending upon the degree of compliance with the standards, one can classify operating systems as fully or partly POSIX compatible.

Based on how the nodes in the overlay network are linked to each other, we can classify the P2P networks as structured or unstructured.

Wright argued that it does not require a trained anthropologist to classify an array of Englishmen, West Africans, and Chinese with 100 % accuracy by features, skin color, and type of hair despite so much variability within each of these groups that every individual can easily be distinguished from every other.

Sesardic argues that when several traits are analyzed at the same time, forensic anthropologists can classify a person's race with an accuracy of close to 100 % based on only skeletal remains.

State socialism can be used to classify any variety of socialist philosophies that advocates the ownership of the means of production by the state apparatus, either as a transitional stage between capitalism and socialism, or as an end-goal in itself.

Systematics uses taxonomy as a primary tool in understanding organisms, as nothing about an organism's relationships with other living things can be understood without it first being properly studied and described in sufficient detail to identify and classify it correctly.

One can classify tools according to their basic functions:

Management tools such as information classification, risk assessment and risk analysis are used to identify threats, classify assets and to rate system vulnerabilities so that effective control can be implemented.

The accuracy of the patterns can then be measured from how many e-mails they correctly classify.

There are at least two qualitative axes on which we can classify these implementations.

There is a significant amount of overlap between the technologies, many of the same vehicles can be used for either, and it is common to classify streetcars / trams as a subtype of light rail rather than as a distinct type of transportation.

Immunostaining can also be used to help diagnose skin conditions, glomerulonephritis and to sub classify amyloid deposits.

Exocrine glands contain a glandular portion and a duct portion, the structures of which can be used to classify the gland.

The classification can be very subjective ; there are many different viewpoints on how to classify Cecropia due to the many changes over the years.

A partial list of Thai words that also classify nouns can be found in Wiktionary category: Thai classifiers.

Regardless of the dimension, it is always possible to classify orthogonal matrices as purely rotational or not, but for 3 × 3 matrices and larger the non-rotational matrices can be more complicated than reflections.

" Based on this definition, it is estimated that there are 350, 000 to 400, 000 Métis Nation citizens in Canada, although many Métis classify anyone as Métis who can prove that an ancestor applied for money scrip or land scrip as part of nineteenth-century treaties with the Canadian government.

Income elasticity can be used to classify goods as normal or inferior.

One can classify the spectrum in exactly the same way as in the bounded case.

A guy can be an active and successful hot rodder for years without becoming even remotely involved with mathematical problems ; ;

Thus, for aqueous media, we can think of the idealized organic active as an oleophilic or hydrophobic surface-active agent, and of an idealized builder as a oleophobic or hydrophilic surface-active agent.

Thus, for non-negative changes in the basic wage rate, the industry becomes the active wage-setter, since any increase in the basic wage rate can occur only by reason of industry acquiescence.

( Anyone active enough can reach a roof, wherever his room may be.

A program of Lay Visitation Evangelism can end in dismal defeat with half the new members drifting away unless practical plans and strenuous efforts are made to keep them in the active fellowship.

Alkanes can be viewed as a molecular tree upon which can be hung the more biologically active / reactive portions ( functional groups ) of the molecule.

Metabolic stimuli such as sugar can help eradicate a certain type of antibiotic tolerant bacteria by keeping their metabolism active.

Maritime support aircraft can drop active and passive sonar devices ( sonobuoys ) and these are also used to determine the location of hostile submarines.

The characterization of the caspases allowed the development of caspase inhibitors which can be used to determine whether a cellular process involves active caspases.

Due to technologic advances in prosthetics, amputees can live active lives with little restriction.

Diffusion, osmosis, and active transport are different ways transport can occur.

A previous BCG vaccination can cause a false positive Mantoux test, although a very high-grade reading is usually due to active disease.

Withdrawal is best managed by transferring the physically dependent patient to an equivalent dose of diazepam because it has the longest half-life of all of the benzodiazepines, is metabolised into long-acting active metabolites and is available in low-potency tablets, which can be quartered for smaller doses.

Chlordiazepoxide, which also has a long half-life and long-acting active metabolites, can be used as an alternative.

By observing which areas of the brain take up the radioactive isotope, we can see which areas of the brain are more active than other areas.

Since oxygenated and deoxygenated blood reflects light by different amounts, we can study which areas are more active ( i. e., those that have more oxygenated blood ).

Measurement of periodic variations of these active regions can also be used to deduce the rotation periods of these stars.

It is a matter of active controversy in various countries and states, and positions can vary within a single political ideology or cultural region.

The inhibitor can produce this effect by e. g. selectively poisoning only certain types of active sites.

It usually involves some form of political participation, but this can vary from token acts to active service in government.

In applications where a somewhat lower quality can be tolerated, such as webcams, cheaper active pixel sensors are generally used.

Stark can also remotely operate his armors ( more than one Iron Man active at a time ).

Many Earth plants and animals undergo major biochemical changes during their life cycles as a response to changing environmental conditions, for example, by having a spore or hibernation state that can be sustained for years or even millennia between more active life stages.

The importance of a corporate body, regardless of its exact function, when such a body is a creature of statute is that its active functions can only be within the scope detailed by the statute which created that corporation.